A new ionic polyacetylene having perfluorinated benzyl substituent, poly(2-ethynyl-N-heptafluorobenzylpyridinium iodide), was synthesized via the direct polymerization of the quaterinazed acetylenic pyridinium monomers. The polymerization proceeded homogeneously without any additional initiator or catalyst to give a moderate yield of polymer. The results of instrumental analyses on the molecular structure

In this paper, a new molecularly imprinted solid-phase extraction (MISPE) method was described for the determination of the chlorpyrifos in water samples. A thiol-ene based UV-cured polymer was prepared by mixing glyoxal bis (-diallyl acetal), pentaerythritol tetrakis (3-mercaptopropionate), polyethylene glycol diacrylate (PEGDA), and photoinitiator. Chlorpyrifos was added to the prepared polymer as

A bearing is an essential mechanical element that is used to fix the axis of a rotating machine and helps rotate the shaft while supporting its weight and load. Numerous types of bearings have been developed depending on the functions and sizes of the machines in which they are utilized. In particular, power generating units such as gas turbines use medium or large hydraulic bearings for smooth operation

The importance of physiologically realistic in vitro skin models in development of cosmetics and drugs for skin disorders have been well recognized, but current in vitro skin models carry several limitations in recapitulating the physiology of the human skin. Recently, in vitro skin models in a microfluidic platform have been proposed with improved physiological relevance. Survival and differentiation

The fluid flow of electrolyte within the cells of the electrochemical batteries has a vital role on the performance of batteries. Many numerically and experimentally investigations have been carried out on this subject. In flooded electrolyte batteries during high rates charging and discharging process, due to the electrochemical reactions, insoluble gas bubbles are produced on the surface of electrodes

In this research, a mathematical model for an industrial methanol reactor is developed comparing different kinetic models: Graaf, Van den Bussche and Froment, pseudo first order and pseudo zero order. Similar studies were not carried out previously. The considered reactor is multi-tubular with a methanol productivity of 2061 ton/day. Comparing the results obtained by mathematical models with experimental